|
| 5 Interface Specifications |
|
|
|
Command | OP Code | Description |
READ BUFFER | 3Ch | Copies the tape drive’s microcode across the SCSI |
|
| bus to the initiator. Used in conjunction with the |
|
| WRITE BUFFER command. |
|
|
|
READ POSITION | 34h | Reports the tape drive’s current logical position but |
|
| does not cause tape motion to occur. Used in |
|
| conjunction with the LOCATE command. |
|
|
|
RECEIVE DIAGNOSTIC | 1Ch | Reports the results of the tests requested by a |
RESULTS |
| previous SEND DIAGNOSTIC command or to obtain a |
|
| trace of SCSI and servo command activity for the tape |
|
| drive. |
|
|
|
RELEASE UNIT | 17h | Releases a tape drive from an initiator’s exclusive use, |
|
| or if |
|
| SCSI device’s use. Used in conjunction with the |
|
| RESERVE UNIT command. |
|
|
|
REQUEST SENSE | 03h | Requests that the tape drive transfer sense data to the |
|
| initiator. |
|
|
|
RESERVE UNIT | 16h | Reserves the tape drive for an initiator’s exclusive use, |
|
| or if |
|
| SCSI device’s use. Used in conjunction with the |
|
| RELEASE UNIT command. |
|
|
|
REWIND | 01h | Causes the tape drive to rewind the tape to the logical |
|
| beginning of tape. |
|
|
|
SEND DIAGNOSTICS | 1Dh | Causes the tape drive to perform certain |
|
| |
|
|
|
SPACE | 11h | Enables the tape drive to perform forward or backward |
|
| searches. |
|
|
|
TEST UNIT READY | 00h | Allows you to determine if the tape drive is ready to |
|
| accept an appropriate medium access command. |
|
|
|
VERIFY | 13h | Enables the tape drive to verify one or more logical |
|
| blocks of data on the tape. |
|
|
|
WRITE | 0Ah | Transfers one or more bytes or blocks of data from the |
|
| initiator to the tape drive. |
|
|
|
WRITE BUFFER | 3Bh | Allows you to load new microcode from the SCSI bus |
|
| into the tape drive’s control memories. Used in |
|
| conjunction with the READ BUFFER command. |
|
|
|
WRITE FILEMARKS | 10h | Causes the tape drive to write zero, one, or more |
|
| filemarks or setmarks (8500c format) to tape. |
|
|
|
May 1994 | ||
| (Standard and XL) |
|